<p class="Default"><strong> </strong></p><p class="Default">The effect of 2,6-dipyridinium selenabicyclo[3.3.1]nonandibromide (996 zh) on the level of lipid peroxidation (LPO), on the activity of glutathione reductase (GR) and on the morphometric parameters of oilseed radish seedlings under normal conditions and under stress (200 mmol NaCl) has been studied. It has been established that the substance 996 zh at a concentration of 100 μm exerted an antioxidant effect reducing the level of lipid peroxidation and increasing the activity of GR. In connection with that the germinating ability of seeds and the biomass of the roots and stems of seedlings increased, both under normal conditions and under stress conditions.</p><p class="Default">The concentration of the substance 996 zh of 1000 μmol had a toxic effect, increasing the LPO level in normal conditions, but neutralized the effect of stress due to the addition of NaCl. This concentration had a slight inhibitory effect on germinability and on root development in seedlings. However, the same concentration of the substance 996 zh (1000 μmol) had a positive effect on the development of shoots under both normal and stressed conditions.</p>
An analysis of five 10-year-old U. victoris cell lines of common origin revealed mixoploidy, significant level of cell polyploidization, quantitative and qualitative changes in individual RAPD-fragments. No regularity was observed in the lines clustering depending on the nutrient medium phytohormone composition or genealogy of the lines. The cytogenetic, molecular and genetic approaches are recommended to ensure reliable determination of somaclonal changes, because the variations in ploidy levels do not always result in the RAPD-polymorphism.
Сравнительный анализ последовательностей участка ITS1-2 рДНК D. antarctica показал, что после ледникового периода в Антарктику могли мигрировать растения вида с различ-ными генотипами. Применение RAPD-маркеров обнаружило различия в уровне полимор-физма между популяциями D. antarctica, расположенными в разных широтах, а также огра-ниченность обмена генетическим материалом между ними.Ключевые слова: Deschampsia antarctica, RAPD-анализ, ITS рДНК, Антарктика. Deschampsia antarctica Desv. является одним из двух аборигенных цветковых растений антарктиче-ской флоры, точное время и направление проник-новения которых в Антарктику остаются неясными. В связи с этим необходим поиск маркеров, позво-ляющих прояснить эти вопросы. Целью работы была оценка генетического полиморфизма D. аntar-ctica из двух регионов Приморской Антарктики ме-тодом RAPD-анализа и путем сравнения нуклео-тидных последовательностей ITS рДНК.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.